Recent comments in /f/explainlikeimfive

_m14lky t1_je2mm9h wrote

When a person experiences a nosebleed, the blood vessels inside the nose break and bleed, causing blood to flow out of the nostrils. However, unlike other types of wounds on the skin, a nose bleed does not typically form a scab because the tissues inside the nose secrete mucus, which helps to keep the wound moist and prevent the formation of a scab.

Additionally, the constant flow of air through the nasal passages can also prevent the formation of a scab. If a scab were to form, it would eventually dry out and may cause irritation or bleeding when inhaled air passes over it, making it difficult for the wound to heal properly. Therefore, it is natural for the body not to attempt to form a scab in the case of a nose bleed.

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preparingtodie t1_je2miav wrote

Generally you want to upshift when engine speed reaches a threshold. The threshold can move some depending on how fast you want to accelerate, but for most driving it's probably around 2500 rpm.

When you're ready to upshift, press in the clutch pedal and at the same time release the accelerator. It takes a little practice, but you want to time it so that you don't release the accelerator too early, which would jerk you back, or release it too late, which would make the engine rev high.

After the clutch is depressed, you should be able to easily shift out of the current gear and into the next gear, with no grinding or strong resistance. If you have either grinding or strong resistance, then either you didn't press the clutch pedal all the way, or the clutch is worn and needs to be replaced.

After engaging the next gear, gradually release the clutch pedal and apply the accelerator. Again, it takes a little practice to time it well so that it isn't jerky, but it doesn't take long to get the feel for it.

For downshifting, you probably want to downshift when engine speed is around 1200 rpm. The process is almost identical. Sometimes it can be more difficult to engage the lower gear, but it really shouldn't be. Again, grinding or resistance indicates either the clutch pedal isn't pressed all the way or the clutch is worn and needs to be replaced. When the new gear is engaged for a downshift, you should increase the engine speed up to about 2500 rpm before releasing the clutch, in order to get a smoother transition. Yet again, practice makes perfect.

Another possible reason for gear grinding is if the synchronizers in the transmission are worn. That would be bad, and indicate that the transmission needs to be repaired or replaced -- or treated with kid gloves for the rest of its life.

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Jayn_Newell t1_je2mgga wrote

Which one “feels” right. As a girl in online gaming spaces ~2006 I got misgendered a lot and it never failed to bother me, because it was wrong. For most of us our gender identity happens to match the psychical body we have, so it’s not usually a problem. For some people it doesn’t, and so it feels wrong to them to be referred to as that gender. (There’s also some people who don’t seem to have any strong gender identity at all, so they generally just go with what society says they are).

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Way2Foxy t1_je2mbj2 wrote

If we suppose the amount of oxygen "lost" is equal to the CO2 added, which is oversimplified but close enough to get the point across, then the atmosphere has increased by about .02% CO2 over the last few centuries.

The atmosphere is about 21% oxygen, so you can see how that's basically a rounding error with regards to oxygen level.

18

AsymmetricalReward t1_je2m5ix wrote

You’re grinding gears not because you’re in the wrong gear, you’re grinding gears because you’re not rev matching.

You need to practice more on the balance of clutch release and gas given. Different for each car, you just learn how to find it faster as you become more experienced driving manual.

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intoxicapable t1_je2m0ns wrote

It means you will not die from ingesting an incidental amount whatever it is. everything has limits though. Drinking water has its limit, our livers can only process about 3.75 gallons per day, any more than that and you'll drown. Nontoxic does not mean you can't be uncomfortable after ingesting said material. Not dying from ingestion of a nontoxic item and being comfortable are not synonyms.

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Second-Officer-Alex t1_je2lwug wrote

For normal driving, try to keep the revs between (approximately) 2,000 and 3,300. Above that, shift to the next gear, below that, shift to the previous.

Shifting at various speeds may also be helpful initially. For example, start on first, of course, but shift to second arond 15mph, from that point on, shift to the gear with the same number as the speed. 3rd gear at 30mph, 4th at 40, 5th at 50, and 6th at 60.

While driving on the highway, at higher speeds and on the top gear, expects to be at that 3,000, or even higher, but that's ok.

The grinding happens because the clutch pedal isn't being depressed fully. Focus on that, and you should be OK, as long as your clutch release technique is fine, but you didn't mention that.

I would even suggest practicing your pedal work and shifting simultaneously with the car off, then with the engine running, but parked. That way you will notice if you're grinding the gears or not. Of course, while parked you won't be releasing the clutch unless you intentionally want to move. Also, above, above 2ng gear, if you release the clutch while parked you will just stall the engine.

Hope this helps.

4

SoulWager t1_je2l0r5 wrote

People that make buildings do not work to a high level of precision. A room can be out of square by an inch and you probably wouldn't notice until you tried to put in flooring that comes in accurately cut rectangular sheets. The last pieces you add get cut to fit, not cut to whatever the dimension is supposed to be.

You can use a tape measure to measure opposite corners and compare to the other pair of corners to check squareness. You use a level to check level.

2

Ape_Togetha_Strong t1_je2kky0 wrote

Mostly it has to do with how other people treat you.

If we treated everyone as if their biological sex didn't determine anything about them other than who they are capable of reproducing with, the idea of "not feeling like the sex you were born with" would seem a lot stranger. Most of what people describe when talking about what it feels like to identify as an gender has to do with the expectations, prejudgement, and treatment from others.

It's really a way of navigating and managing other people's expectations for you in a world where many, many people still use sex as a way of categorizing people for things OTHER than procreation, and use gender presentation as a proxy for sex.

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jamesgelliott t1_je2jje2 wrote

"Choice.

Really, that's the crux of it. A person can choose to identify however they want, there's no set criteria for what would make a person choose to be identified as male or female, it's simply "What makes that person feel more comfortable?"

Yes. However a person chooses to identify, it doesn't validate their choice.

Everyone should be be treated with respect and and dignity but that doesn't mean their choice should be met with validation.

I have worked as a psych RN. It's OK to validate someone's feelings but it doesn't make it true.

As long as someone's beliefs don't infringe on other peoples rights, that's OK.

So a homeless person demanding others validate their delusion is wrong. But if a homeless person believes they are Elvis or JFK, then just leave them alone and get them help if they WANT it.

−5

left_lane_camper t1_je2ioxh wrote

People have already correctly noted the extreme emptiness of space and the careful mission planning, but there's another fundamental reason why a probe like Voyager isn't going to start orbiting something (that it isn't already orbiting, like the center of the galaxy).

Newtonian orbits are what's called "conservative". That means they don't gain or lose any energy during the orbit, they just exchange kinetic energy (the energy something moving has) for gravitational potential energy (the extra energy something gets from going uphill against gravity) and back again.

One of the effects this conservation of energy has is that if a probe falls into the gravity well of a celestial body of some sort, the probe will just exchange potential energy for kinetic as it falls into the gravity well, and then exchange kinetic back to potential as it flies away out of it. If it fell towards the celestial body from a very large distance (where the gravity of the celestial body was effectively zero) and had some initial speed, then it wasn't initially gravitationally bound to that celestial object and it won't be gravitationally bound to it in the end, either. It has enough total energy (kinetic plus potential) that it will simply fly away from the celestial body just like it flew towards it and won't go into orbit!

Now, if the probe fires its thrusters, or if it interacts with the planets atmosphere, or if it interacts with a third body, then it is still possible for it to go into orbit of the planet. But the first takes active intervention by the mission controllers, the second requires incredibly precise flying to interact just right with the atmosphere so as not to burn up (and it would come around and interact repeatedly until its orbit did decay), and the third requires an even more improbable and specific three-body interaction where the two-body interaction is already fantastically unlikely.

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Dorkamundo t1_je2he2g wrote

Choice.

Really, that's the crux of it. A person can choose to identify however they want, there's no set criteria for what would make a person choose to be identified as male or female, it's simply "What makes that person feel more comfortable?"

Now, inevitably this is confusing for people at times, especially when the outward signs would suggest that the person should be considered one or the other based on appearance. But making mistakes is part of life, and if that person tells you they prefer another pronoun, it's just common courtesy to do so.

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